FIX: Get-AzureADGroupMember: Error occurred while executing AddGroupMember

Message: One or more added object references already exist for the following modified properties: ‘members’.

This is very specific, but I received the error message below after I tried to add users to an AzureAD group, after I first emptied the group.

Add-AzureADGroupMember : Error occurred while executing AddGroupMember 
Code: Request_BadRequest
Message: One or more added object references already exist for the following modified properties: 'members'.
RequestId: c257ce87-68f6-4d08-8bb3-4c54c7d25d8f
DateTimeStamp: Mon, 20 May 2019 10:26:17 GMT
HttpStatusCode: BadRequest
HttpStatusDescription: Bad Request
HttpResponseStatus: Completed

Do you recognize this?
Then this blog post will help you.


Let’s “Fix” this then?

It sounds a bit too specific, but I’m sure more Azure Engineers are experiencing this problem.

In my script I first remove all users (Devices) from an AzureAD Group, and then I retrieve all managed users (Devices) and add them again to the AzureAD Group.

$AddToGroup = "Group"

$RegisteredOwnerUpn = "EMAIL"  

$group = Get-AzureADGroup -SearchString "$($AddToGroup)" -ErrorAction Stop

$AllDEMDevices = (Get-MsolDevice -RegisteredOwnerUpn $RegisteredOwnerUpn)

   

foreach ($CurrentMember in $(Get-AzureADGroupMember -ObjectId $($group.ObjectId)))

{

    Remove-AzureADGroupMember -ObjectId $($group.ObjectId) -MemberId $($CurrentMember.ObjectId)

}

foreach ($DEMDevice in $AllDEMDevices)

{

    Add-AzureADGroupMember -ObjectId $($group.ObjectId) -RefObjectId $DEMDevice.ObjectId.Guid

}

Only when I added the last user every time I got an error message that it was already in the group. Strange, because I completely empty the group?

After a while (I don’t dare to admit how long) I found out my mistake.

I looked at docs.microsoft.com for Get-AzureADGroupMember and I immediately noticed that -All is there.

Apparently Get-AzureADGroupMember has a maximum of 100 results. Because of this my last user was not retrieved, nor removed from the group.

And yes, that really is the solution:

Get-AzureADGroupMember -ObjectId $($group.ObjectId) -All $true

Dare to admit!

Do you dare to admit your mistake !? Then leave a comment.


A little extra

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Published by

Bas Wijdenes

My name is Bas Wijdenes and I work full-time as a Services Engineer. In my spare time I write about the error messages that I encounter during my work. Furthermore, I am currently occupied with Office 365, Azure infrastructure, and PowerShell for automating daily tasks.

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